Experimental method of detecting relic neutrino by atomic de-excitation

M. Yoshimura, N. Sasao, M. Tanaka

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


The cosmic background neutrino of temperature 1.9 K affects rates of radiative emission of neutrino pairs (RENP) from metastable excited atoms, since its presence blocks the pair emission by the Pauli exclusion principle. We quantitatively investigate how the Pauli blocking distorts the photon energy spectrum and calculate its sensitivity to cosmic parameters such as the neutrino temperature and its chemical potential. Important quantities for high sensitivities to these parameter measurements are found to be the level spacing of atomic deexcitation and the unknown mass value of the lightest neutrino, in particular, their relationship to one another.

Original languageEnglish
Article number063516
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number6
Publication statusPublished - Mar 9 2015

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)


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